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匹配条件： “ Youhei Fujioka” ，找到相关结果约364条。
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Intervention Effects on the Willingness to Stop Smoking and Social Nicotine Dependence Based on Single-Session Group Therapy with Frequent Use of Role Play Targeting Smokers with Mental Disorders  [PDF]
Youhei Komatsu, Youko Sarada
Open Journal of Medical Psychology (OJMP) , 2018, DOI: 10.4236/ojmp.2018.74009
Abstract: Objective: We devised a “Smoking-Cessation Motivation Program” as a community welfare service aimed at making short-term improvements in social nicotine dependence and enhancing the willingness to stop smoking among people with mental disorders. Method: The study conducted a controlled trial to empirically examine the effects of the program on the willingness to stop smoking and social nicotine dependence among 26 smokers with mental disorders in the intervention group, who were compared with a control group of 16 individuals. Results: Results demonstrated the program’s effectiveness in reducing social nicotine dependence, and a variance analysis with age as the covariate evidenced a mutual interaction between social nicotine dependence and the willingness to stop smoking, confidence to stop smoking, and resisting the temptation to smoke. Conclusion: Future studies should examine longer-term program results, the impact of program duration, and other factors that influence the program’s effectiveness.
20/(fasting C-peptide x fasting plasma glucose) is a simple and effective index of insulin resistance in patients with type 2 diabetes mellitus: a preliminary report
Tsuyoshi Ohkura, Hideki Shiochi, Youhei Fujioka, Keisuke Sumi, Naoya Yamamoto, Kazuhiko Matsuzawa, Shoichiro Izawa, Hiroshi Kinoshita, Hiroko Ohkura, Masahiko Kato, Shin-ichi Taniguchi, Kazuhiro Yamamoto
Cardiovascular Diabetology , 2013, DOI: 10.1186/1475-2840-12-21
Abstract: Fifteen patients [mean age: 53 years, fasting plasma glucose (FPG) 7.7 mmol/L, HbA1c 7.1% (54 mmol/mol), body mass index 26.8 kg/m2] underwent a MTT and a glucose clamp. Participants were given a test meal (450 kcal). Plasma glucose and insulin were measured at 0 (fasting), 30, 60, 120, and 180 min. Serum C-peptide immunoreactivity (CPR) was measured at 0 (fasting; F-CPR) and 120 min. Homeostasis model assessment of insulin resistance (HOMA-IR) and insulin sensitivity indices (ISI) were calculated from the MTT results. The glucose infusion rate (GIR) was measured during hyperinsulinemic--euglycemic glucose clamps.The mean GIR in all patients was 5.8 mg.kg--1.min--1. The index 20/(F-CPR x FPG) was correlated strongly with GIR (r = 0.83, P < 0.0005). HOMA-IR (r = -0.74, P < 0.005) and ISI (r = 0.66, P < 0.01) were also correlated with GIR. In 10 patients with mild insulin resistance (GIR 5.0--10.0 mg.kg--1.min--1), 20/(F-CPR x FPG) was very strongly correlated with GIR (r = 0.90, P < 0.0005), but not with HOMA-IR and ISI (r = -0.49, P = 0.15; r = 0.20, P = 0.56, respectively). In patients with mild insulin resistance, plasma adiponectin (r = 0.65, P < 0.05), but not BMI or waist circumstance, was correlated with GIR.20/(F-CPR x FPG) is a simple and effective index of insulin resistance, and performs better than HOMA-IR and ISI in Japanese patients with type 2 diabetes mellitus. Our results suggest that 20/(F-CPR x FPG) is a more effective index than HOMA-IR in Japanese patients with mild insulin resistance.
Undulation Amplitude of a Fluid Membrane Surrounded by Near-Critical Binary Fluid Mixtures
Youhei Fujitani
Physics , 2014, DOI: 10.1103/PhysRevE.91.042402
Abstract: We consider the thermal undulation, or shape fluctuation, of an almost planar fluid membrane surrounded by the same near-critical binary fluid mixtures on both sides. A weak preferential attraction is assumed between the membrane and one component of the mixture. We use the Gaussian free-energy functional to study the equilibrium average of the undulation amplitude within the linear approximation with respect to the amplitude. According to our result given by a simple analytic formula, the ambient near-criticality tends to suppress the undulation of a membrane, and this suppression effect can overwhelm that of the bending rigidity for small wave numbers. Thus, the ambient near-criticality is suggested to prevent a large membrane from becoming floppy even if the lateral tension vanishes at the equilibrium.
Calculation of Helium Ground State Energy by Bohr's Theory-Based Methods
Youhei Tsubono
Physics , 2009,
Abstract: Bohr's model agreed with the hydrogen spectrum results, but did not agree with the spectrum of Helium. Here we show that Bohr's model-based methods can calculate the experimental value (-79.005 eV) of Helium ground state energy correctly. we suppose the orbital planes of the two electrons are perpendicular to each other. By a computational method, we calculate the Coulomb force among the particles, and the number of de Broglie's waves contained in the short segment at short time intervals. Our results demonstrate that two electrons of Helium are actually moving around, not as electron clouds.
Impact of MHD Turbulence on Thermal Wind Balance in the Sun
Youhei Masada
Physics , 2010, DOI: 10.1111/j.1745-3933.2010.00987.x
Abstract: The possible role of magneto-rotational instability (MRI) and its driven MHD turbulence in the solar interior is studied on the basis of the linear and nonlinear theories coupling with physical parameters, providing solar rotation profile inverted from the helioseismic observation and a standard model for the internal structure of the sun. We find that the MRI venue is confined to the higher-latitude tachocline and lower-latitude near-surface shear layer. It is especially interesting that the MRI-active region around the tachocline closely overlaps with the area indicating a steep entropy rise which is required from the thermal wind balance in the sun. This suggests that the MRI-driven turbulence plays a crucial role in maintaining the thermal wind balance in the sun via the exceptional turbulent heating and equatorward angular momentum transports. The warm pole existing around the tachocline might be a natural outcome of the turbulent activities energized by the MRI.
Undulation Amplitude of a Fluid Membrane Immersed in a Near-Critical Binary Fluid Mixture beyond the Regime of the Gaussian Model with Weak Preferential Attraction
Youhei Fujitani
Physics , 2015,
Abstract: The shape fluctuation of an almost planar fluid membrane immersed in a near-critical binary fluid mixture is considered within the linear approximation with respect to its amplitude. It is usual that one component is preferably attracted by the membrane, which generates the additional stress including the osmotic pressure. By using the Gaussian free-energy functional and assuming the preferential attraction to be sufficiently weak, the present author recently pointed out theoretically that the ambient near-criticality tends to suppress the mean square amplitude; the generated restoring force has the wavenumber-squared dependence and becomes larger with the correlation length far from the membrane. In this paper, we first calculate this equal-time correlation in the Gaussian model beyond the regime of the weak preferential attraction. The result shows that the suppression effect continues although the numerical factor of the restoring force is effectively reduced to about half. Second, assuming the critical fraction far from the membrane, we calculate by using the renormalized local functional theory. The result turns out to be almost equal to the corresponding result in the Gaussian model if the correlation length is regarded as the one near the membrane. Thus, the suppression effect reaches a plateau as the temperature approaches the critical one, which cannot be expected by the Gaussian model.
Fluctuation Amplitude of a Trapped Rigid Sphere Immersed in a Near-Critical Binary Fluid Mixture
Youhei Fujitani
Physics , 2015,
Abstract: The position of a colloidal particle trapped in an external field thermally fluctuates at the equilibrium. As is well known, the ambient fluid is not a simple heat bath and a moving particle appears heavier, which influences the mean square velocity of the particle. When the ambient fluid is a near-critical binary fluid mixture, the profile of the concentration difference does not follow the particle motion totally, which is expected to influence the mean square displacement of the particle. We calculate the influence in a simple case, where a rigid sphere fluctuates with small amplitude, the mixture in the homogeneous phase is near, but not very close to, the critical point, and the particle surface attracts one component weakly. What we calculate is an equal-time correlation, but we utilize the hydrodynamics in the limit of no dissipation to examine the contribution from the ambient fluid. According to our result, the mean square displacement is reduced by the additional stress, including the osmotic pressure, due to the ambient near-criticality combined with the preferential attraction.
Analysis of a Natural Gradient Algorithm on Monotonic Convex-Quadratic-Composite Functions
Youhei Akimoto
Mathematics , 2012,
Abstract: In this paper we investigate the convergence properties of a variant of the Covariance Matrix Adaptation Evolution Strategy (CMA-ES). Our study is based on the recent theoretical foundation that the pure rank-mu update CMA-ES performs the natural gradient descent on the parameter space of Gaussian distributions. We derive a novel variant of the natural gradient method where the parameters of the Gaussian distribution are updated along the natural gradient to improve a newly defined function on the parameter space. We study this algorithm on composites of a monotone function with a convex quadratic function. We prove that our algorithm adapts the covariance matrix so that it becomes proportional to the inverse of the Hessian of the original objective function. We also show the speed of covariance matrix adaptation and the speed of convergence of the parameters. We introduce a stochastic algorithm that approximates the natural gradient with finite samples and present some simulated results to evaluate how precisely the stochastic algorithm approximates the deterministic, ideal one under finite samples and to see how similarly our algorithm and the CMA-ES perform.
The Treatment Strategy of Patients with Sleep Apnea Syndrome in Our Department and Subsequent Course  [PDF]
Takanori Fujioka, Hideo Yamane
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2014, DOI: 10.4236/ijohns.2014.34033
Abstract:

It is known that acute or chronic heart failure can develop in patients with grave sleep apnea syndrome (SAS), and known to have the social problem including an accident and the decrease of the labor will. Several medical treatments are now available for SAS. We considered problems of the treatment based on the practice situation of our department about the present conditions and subsequent treatment. The subjects consisted of 306 patients. We measured Epworth Sleepiness Scale (ESS) and apnea hypopnea index (AHI) after polysomnography in all patients at the first time and 6 months later. So, it was found that AHI and ESS decreased when we could be treated in the SAS patients appropriately. It was confirmed that the choice of the appropriate regimen was important.

Web-GIS Based Visualization System of Predicted Ground Vibration Induced by Blasting in Urban Quarry Sites  [PDF]
Youhei Kawamura, Yoshio Moriyama, Hyongdoo Jang
Journal of Geographic Information System (JGIS) , 2019, DOI: 10.4236/jgis.2019.111002
Abstract: Blasting is routinely carried out at various resource extraction sites, even in urban areas. As a consequence of this, residents around urban quarry sites are affected by ground vibration induced by blasting on a regular basis. In this study, a prediction and visualization system for ground vibrations is developed for the purpose of reducing the adverse psychological effects of blasting. The system consists of predicting ground vibration using an Artificial Neural Network (ANN) and visualizing it on an online map using Web-GIS. A prediction model using ANN that learned the optimum weight by taking 50 sets of data indicated a regression value of 0.859 and a Mean Square Error (MSE) of 0.0228. Compared with previous researches, these values are not bad results. Peak Particle Velocity (PPV) was used as a metric to measure ground vibration intensity. A color contour is generated using GIS tools based on the PPV value of each prediction point. The system is completed by overlaying the contour onto a basic map in a website. The basic map shows the surrounding area through the use of Google Maps data. This system can be used by anyone with access to the internet and a browser, requiring no special software or hardware. In addition, mining operations can utilize the data to modify blasting design and planning to minimize ground vibration. In conclusion, this system has the potential to alleviate the worries of surrounding residents caused by ground vibrations from blasting due to the fact that they can personally check the predicted vibration around their locale. Furthermore, since this data will be publicly available on the internet, it is also possible that this system can contribute to research in other fields.
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